Terra Codex
// the open codex of terraria
// Pre-Hardmode event

Blood Moon

Trigger
Random ~1/9 chance each night once at least one player has 120 max HP (and not on the night of a Full Moon).
Duration
One full night
Spawn changes
Enemies spawn at ~3.4× normal rate. Drippler, Wandering Eye Fish, Zombie Merman, Blood Zombie, Hemogoblin Shark and more replace surface natives.
Rewards
Money Trough, Bloody Tear, Sharkron Balloon, Hemogoblin Shark, Drippler trophies.

Enemies during the Blood Moon · 20

Blood Eel Blood EelBlood Eel Blood EelBlood Eel Blood EelBlood Squid Blood SquidBlood Zombie Blood ZombieChattering Teeth Bomb Chattering Teeth BombClown ClownCorrupt Bunny Corrupt BunnyCorrupt Goldfish Corrupt GoldfishCorrupt Penguin Corrupt PenguinDreadnautilus DreadnautilusDrippler DripplerHemogoblin Shark Hemogoblin SharkThe Bride The BrideThe Groom The GroomVicious Bunny Vicious BunnyVicious Goldfish Vicious GoldfishVicious Penguin Vicious PenguinWandering Eye Fish Wandering Eye FishZombie Merman Zombie Merman

Frequently asked

How do you start a Blood Moon in Terraria?

Random ~1/9 chance each night once at least one player has 120 max HP (and not on the night of a Full Moon).

How long does the Blood Moon last?

One full night

What are the rewards from the Blood Moon?

Money Trough, Bloody Tear, Sharkron Balloon, Hemogoblin Shark, Drippler trophies.